Perhaps you should try some spelling variations:
thuoc dieu » thuc dieu, hoc dieu, thuat dieu
nhan dang » nhan dan, phan dang, tran dang
van khang » van khanh, van thanh, van quang
van hang » van hoang, van thang, ban hang
cong dan » cong san, cong tan, huong dan
dan toan » van toan, dan than, manh toan
toan ban » van ban

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: thuoc dieu hanh - nhan dang ((van hang) or (van khang)) cong dan toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuoc dieu hanh - nhan dang ((van hang) OR (van khang)) cong dan toan ban.
• Adding a wildcard symbol may retrieve word variants: thuoc dieu hanh - nhan dang ((van hang) or (van khang)) cong dan toan ban*.